In the first accurate assessment of the impact of the treaty, Macquarie University climate dynamicist Murry Salby and his colleague Lilia Deschamps from the Bureau of Meteorology found that the ozone layer was about 10 per cent along the road to recovery.

(Stock photo / Mark Interrante) With the aid of a digital flow-tracking technology, fluid dynamicist Timothy Wei and his colleagues have, for the first time, directly addressed Gray's paradox -- and proven it wrong.